glebius 9297dd4c7e When we receive an ICMP unreach need fragmentation datagram, we take ... proposed MTU value from it and update the TCP host cache. Then tcp_mss_update() is called on the corresponding tcpcb. It finds the just allocated entry in the TCP host cache and updates MSS on the tcpcb. And then we do a fast retransmit of what we have in the tcp send buffer. This sequence gets broken if the TCP host cache is exausted. In this case allocation fails, and later called tcp_mss_update() finds nothing in cache. The fast retransmit is done with not reduced MSS and is immidiately replied by remote host with new ICMP datagrams and the cycle repeats. This ping-pong can go up to wirespeed. To fix this: - tcp_mss_update() gets new parameter - mtuoffer, that is like offer, but needs to have min_protoh subtracted. - tcp_mtudisc() as notification method renamed to tcp_mtudisc_notify(). - tcp_mtudisc() now accepts not a useless error argument, but proposed MTU value, that is passed to tcp_mss_update() as mtuoffer. Reported by: az Reported by: Andrey Zonov <andrey zonov.org> Reviewed by: andre (previous version of patch)		2012-04-16 13:49:03 +00:00
..
amd64	add actual interrupt counters to back ipi_invlcache_counts	2012-04-13 07:18:19 +00:00
arm	Replace the C implementation of __aeabi_read_tp with an assembly version.	2012-04-16 09:38:20 +00:00
boot	zfsboot: honor -q if it's present in boot.config	2012-04-16 10:43:06 +00:00
bsm
cam	Refactor da(4) to remove one of two code paths used to query capacity	2012-04-12 12:58:14 +00:00
cddl	- Introduce a cache-miss optimization for consistency with other	2012-04-09 17:05:18 +00:00
compat	Remove some unnecessary includes.	2012-03-18 19:15:11 +00:00
conf	Fix some style bugs introduced in a previous commit (r233045)	2012-04-14 23:53:31 +00:00
contrib	Fix VIMAGE build.	2012-04-05 04:41:06 +00:00
crypto	Add support for the extended FPU states on amd64, both for native	2012-01-21 17:45:27 +00:00
ddb	Update the ddb and gdb backends for the new 'trace_thread' hook.	2012-04-12 21:34:58 +00:00
dev	Migrate the net80211 TX aggregation state to be from per-AC to per-TID.	2012-04-15 20:29:39 +00:00
fs	Provide better description for vfs.tmpfs.memory_reserved sysctl.	2012-04-15 21:59:28 +00:00
gdb	Update the ddb and gdb backends for the new 'trace_thread' hook.	2012-04-12 21:34:58 +00:00
geom	Expand locking around identification of filesystem mount point when	2012-04-08 06:20:21 +00:00
gnu/fs	Make ReiserFS MPSAFE	2012-03-27 20:36:03 +00:00
i386	add actual interrupt counters to back ipi_invlcache_counts	2012-04-13 07:18:19 +00:00
ia64	Remove pty(4) from our kernel configurations.	2012-03-21 08:38:42 +00:00
isa	- There's no need to overwrite the default device method with the default	2011-11-22 21:28:20 +00:00
kern	Fix a typo.	2012-04-14 23:59:58 +00:00
kgssapi	Add missing break statement to make sure all 3DES etypes really are treated	2011-10-10 09:13:07 +00:00
libkern	Remove second consts in r233288 in order to appease C++ compilers.	2012-03-26 18:22:04 +00:00
mips	Add in the AP96 phy configuration from openwrt.	2012-04-15 22:59:56 +00:00
modules	Fix LINT builds after r234233; not sure why modules need DEBUG by default.	2012-04-14 13:40:39 +00:00
net	A bit of cleanup in the names of fields of netmap-related structures.	2012-04-13 16:03:07 +00:00
net80211	Migrate the net80211 TX aggregation state to be from per-AC to per-TID.	2012-04-15 20:29:39 +00:00
netatalk	Fix typos	2012-02-28 15:07:05 +00:00
netgraph	#include <net/vnet.h> is no longer needed here.	2012-04-16 13:41:46 +00:00
netinet	When we receive an ICMP unreach need fragmentation datagram, we take	2012-04-16 13:49:03 +00:00
netinet6	in6_pcblookup_local() still can return a pcb with NULL	2012-03-21 08:43:38 +00:00
netipsec	Merge multi-FIB IPv6 support from projects/multi-fibv6/head/:	2012-02-17 02:39:58 +00:00
netipx	Convert all users of IF_ADDR_LOCK to use new locking macros that specify	2012-01-05 19:00:36 +00:00
netnatm
netncp	Change ncp_scan_bindery_object() to pass a constant search string.	2011-10-16 08:44:03 +00:00
netsmb	Add unicode support to msdosfs and smbfs; original pathes from imura,	2011-11-18 03:05:20 +00:00
nfs	Merge multi-FIB IPv6 support from projects/multi-fibv6/head/:	2012-02-17 02:39:58 +00:00
nfsclient	Remove fifo.h. The only used function declaration from the header is	2012-03-11 12:19:58 +00:00
nfsserver	Honor NFSv3 commit call (RFC 1813, Section 3.3.21) where when count is 0,	2011-12-15 02:26:53 +00:00
nlm	jwd@ reported a problem via email to freebsd-fs@ on Aug 25, 2011	2012-01-31 02:11:05 +00:00
ofed	Add OFED and the associated options and drivers to x86 LINT builds:	2012-04-12 14:01:06 +00:00
opencrypto
pc98	Move the legacy(4) driver to x86.	2012-03-30 19:10:14 +00:00
pci	intpm: add ATI IXP400 pci id	2012-04-16 10:33:46 +00:00
powerpc	We don't need kcopy() in any of the remaining places it is used, so	2012-04-11 22:23:50 +00:00
rpc	Both a crash reported on freebsd-current on Oct. 18 under the	2011-11-03 14:38:03 +00:00
security	When allocation of labels on files is implicitly disabled due to MAC	2012-04-08 11:01:49 +00:00
sparc64	Merge from x86:	2012-04-13 22:58:23 +00:00
sys	- Extend the KDB interface to add a per-debugger callback to print a	2012-04-12 17:43:59 +00:00
teken	Link the demo application against ncursesw to make Unicode work.	2011-10-13 14:20:27 +00:00
tools	Make vnode_if.awk parse vnode operations with underscores, like VOP_FOO_BAR.	2012-02-21 19:35:59 +00:00
ufs	Export vinactive() from kern/vfs_subr.c (e.g., make it no longer	2012-04-11 23:01:11 +00:00
vm	- Introduce a cache-miss optimization for consistency with other	2012-04-09 17:05:18 +00:00
x86	Trim stray blank line.	2012-04-11 21:00:33 +00:00
xdr
xen	blkif interface comment cleanups. No functional changes	2012-02-29 17:47:01 +00:00
Makefile	Add sys/ofed to the 'make cscope' target.	2012-03-20 18:05:15 +00:00